You're Titan :

As the title says, you will play Minecraft, but in a giant form, with a greater speed and a higher jump. 
You have used these commands to create the giant character and you also have to increase the speed of the character and the strength of its leap 
/attribute @p minecraft:scale base set (value)
To resize 
To change the speed:
/attribute @p minecraft:movement_speed base set (value)
To change the size of the jump:
/attribute @p minecraft:jump_strength base set (value)